Stochastic model for predicting the bending strength of glued-laminated timber based on the knot area ratio and localized MOE in lamina

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 6 Distribution parameters of tensile strengths for finger joint

Lamina size (mm)	Grade^a	Percentage of failure (%)			5% NPE^b	2P-Weibull^c
Lamina size (mm)	Grade^a	Finger joint	Knot	Grip	5% NPE^b	5% WPE^d	Shape	Scale
38 × 89	E8	66.7	6.7	26.7	17.81	16.78	6.97	25.69
	E10	73.3	10.0	16.7	22.39	21.49	6.73	33.40
	E12	100	0	0	23.56	24.58	6.49	38.85
38 × 140	E8	73.3	16.7	10.0	19.72	18.64	7.50	27.70
	E10	80.6	12.9	6.5	22.20	21.96	5.81	36.61
	E12	100	0	0	24.54	24.70	6.24	39.76